EP 3692238 B1 20230726 - DIRECTIONAL DRILLING
Title (en)
DIRECTIONAL DRILLING
Title (de)
DIREKTIONALES BOHREN
Title (fr)
FORAGE DIRIGÉ
Publication
Application
Priority
- GB 201716427 A 20171006
- EP 2018077367 W 20181008
Abstract (en)
[origin: GB2567225A] In preparation for directional drilling, a wedge supported distally ahead of a tubular drill string 12 is advanced along a parent hole. The wedge 28 is connected to the drill string by a rigid link that extends along a central longitudinal axis through an annular cutting head. The wedge may be connected to the drill string via an inner dropper mechanism 20 that can be engaged by a wireline lifting system. After locking the wedge at a kick-off point in the hole at a desired azimuth, using the locking mechanism 24, the connection of the link is broken. The dropper mechanism can then be retrieved and replaced by an inner core tube, without moving the drill string. The drill string is then advanced to drill a daughter hole that branches from the parent hole on the azimuth determined by the wedge. Advantageously, there is no need to withdraw the drill string before drilling the daughter hole can commence. Also claimed is a method of determining the azimuth of the wedge.
IPC 8 full level
E21B 7/06 (2006.01); E21B 23/01 (2006.01); E21B 25/02 (2006.01)
CPC (source: EA EP GB US)
E21B 7/06 (2013.01 - EA GB); E21B 7/061 (2013.01 - EA EP GB US); E21B 7/067 (2013.01 - US); E21B 23/01 (2013.01 - EA EP); E21B 23/0411 (2020.05 - US); E21B 25/02 (2013.01 - EA EP US); E21B 47/024 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
GB 201716427 D0 20171122; GB 2567225 A 20190410; GB 2567225 B 20200226; AU 2018344534 A1 20200521; AU 2018344534 B2 20240620; CA 3078548 A1 20190411; EA 202090912 A1 20200810; EP 3692238 A2 20200812; EP 3692238 B1 20230726; EP 3692238 C0 20230726; ES 2953676 T3 20231115; PL 3692238 T3 20240205; RS 64808 B1 20231229; US 11788358 B2 20231017; US 2020318433 A1 20201008; US 2023358100 A1 20231109; WO 2019068938 A2 20190411; WO 2019068938 A3 20190516
DOCDB simple family (application)
GB 201716427 A 20171006; AU 2018344534 A 20181008; CA 3078548 A 20181008; EA 202090912 A 20181008; EP 18793365 A 20181008; EP 2018077367 W 20181008; ES 18793365 T 20181008; PL 18793365 T 20181008; RS P20230979 A 20181008; US 201816753526 A 20181008; US 202318355593 A 20230720